You can disable AF_INET6 support in a Common INET environment in one of two ways.

• Stop all active dual-mode TCP/IP stacks while IPv4-only stacks remain active. Applications are no longer able to open AF_INET6 sockets, although they can continue to use any AF_INET6 sockets that are already open and not bound to one of the stopped dual-mode TCP/IP stacks. However, applications are able to open AF_INET sockets.
• Dynamically disable AF_INET6 in BPXPRMxx and stop all active dual-mode TCP/IP stacks. When restarted, the dual-mode-capable TCP/IP stacks start as IPv4-only stacks. In effect, this is a subset of the previous case. To disable AF_INET6 support, issue the SETOMVS RESET= command to set the AF_INET6 MAXSOCKETS value to 0.